# Thread: WHOS got the trig brain for this one?????

1. ## WHOS got the trig brain for this one?????

for each of the sinusoidal equations

a) state the mapping rule
B) use the mapping tecnique to build a table of values for each function. for the basic function, y = sin x use values of x = 0 degrees, 90, 180, 270, 360 degrees. then use your mapping to build the table for the functions.
c) sketch a graph

i) y = 3 sin2x

ii) y - 1 = cos(x+45degrees)

iii) y = 3/4sin 1/2x - 1

iv) - (y-4) = cos(x-30degrees) no graph required

v) y = 2 cos4 (x+60degrees) - 3 no graph

thanks if you could help with any of them or all them its great

2. ## Re: WHOS got the trig brain for this one?????

Originally Posted by peiranger
for each of the sinusoidal equations

a) state the mapping rule
B) use the mapping tecnique to build a table of values for each function. for the basic function, y = sin x use values of x = 0 degrees, 90, 180, 270, 360 degrees. then use your mapping to build the table for the functions.
c) sketch a graph

i) y = 3 sin2x

ii) y - 1 = cos(x+45degrees)

iii) y = 3/4sin 1/2x - 1

iv) - (y-4) = cos(x-30degrees) no graph required

v) y = 2 cos4 (x+60degrees) - 3 no graph

thanks if you could help with any of them or all them its great
I suggest you read the forum rules - among other rules being broken, you are supposed to show some effort.

3. ## Re: WHOS got the trig brain for this one?????

i have them answered i just wanted to make sure they are correct

4. ## Re: WHOS got the trig brain for this one?????

Well then post what you have done and we can check them.